Federal Communications Commission nominees Jessica Rosenworcel and Ajit Pai received broad bipartisan support — but some tough questions — from Senate Commerce Committee members during a confirmation hearing on Wednesday.

And panel Chairman Jay Rockefeller (D-W.Va.) brushed aside a threat by Sen. Chuck Grassley (R-Iowa), renewed on Wednesday, to block the nominees if they reach the floor. Grassley said he won’t back down until the FCC releases documents he has requested about LightSquared’s push for a new wireless network.

“I continue to talk with him,” Rockefeller told POLITICO after the hearing. “I’m confident we can work it out.”

Rockefeller said he plans to schedule a committee vote on Rosenworcel and Pai soon and is optimistic a floor vote would follow shortly after that.

Grassley’s threat appears to be the only roadblock facing Rosenworcel and Pai.

“I believe we have before us two well-qualified nominees … and I hope we can move and confirm them before the holiday,” Sen. Jim DeMint (R-S.C.) said during his opening remarks at the confirmation hearing.

Democrats agreed.

“You are both very impressive,” Sen. Amy Klobuchar (D-Minn.) said to the candidates.

But senators also pressed the nominees on some touchy topics.

Committee ranking member Sen. Kay Bailey Hutchison (R-Texas) asked Pai whether he would have a conflict of interest on some issues given that his current law firm, Jenner & Block, represents telecommunication companies.

“I have not represented any clients before the FCC,” Pai said, claiming he knew from his first day at the firm that he was under consideration to become a commissioner and thus avoided any cases that would create a conflict.

Pai, who joined Jenner & Block in April, said his short tenure at the firm would not preclude him from being an impartial public servant. Jenner & Block represents Cablevision and Charter Communications before the FCC. The firm also represents Time Warner Cable, a source said.

The two candidates outlined similar philosophies during the hearing, emphasizing the importance of promoting competition and protecting consumers.

When asked by several lawmakers about their view on net neutrality, both candidates said the matter is under court review and that they would respect whatever decision emerges.